strndup
| Defined in header <string.h>
|
||
| (dynamic memory TR) | ||
Returns a pointer to a null-terminated byte string, which contains copies of at most size bytes from the string pointed to by str. If the null terminator is not encountered in the first size bytes, it is added to the duplicated string.
The returned pointer must be passed to MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 11 HOURS 39 MINUTES 34 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE to avoid a memory leak.
If an error occurs, a null pointer is returned and MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 11 HOURS 39 MINUTES 33 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE may be set.
As all functions from Dynamic Memory TR, strndup is only guaranteed to be available if __STDC_ALLOC_LIB__ is defined by the implementation and if the user defines __STDC_WANT_LIB_EXT2__ to the integer constant 1 before including string.h.
Parameters
| str | - | pointer to the null-terminated byte string to duplicate |
| size | - | max number of bytes to copy from str
|
Return value
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Notes
The function is identical to the MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 11 HOURS 39 MINUTES 30 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE except that it is allowed, but not required to set MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 11 HOURS 39 MINUTES 29 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE on error.
Example
#ifdef __STDC_ALLOC_LIB__ #define __STDC_WANT_LIB_EXT2__ 1 #else #define _POSIX_C_SOURCE 200809L #endif #include <string.h> #include <stdio.h> #include <stdlib.h> int main(void) { const char *s1 = "String"; char *s2 = strndup(s1, 2); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 11 HOURS 39 MINUTES 28 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("strndup(\"String\", 2) == %s\n", s2); MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 11 HOURS 39 MINUTES 27 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE(s2); }
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strndup("String", 2) == StSee also
| (dynamic memory TR) |
allocate a copy of a string (function) |
| (哋它亢11) |
copies a certain amount of characters from one string to another (function) |
| allocates memory (function) |